The most effective way to deal with a hangover is a combination of rehydrating, eating, resting, and waiting it out. The average hangover lasts about 18 hours from your last drink, with symptoms peaking roughly 14 hours after you started drinking. There’s no magic cure, but understanding what’s actually happening in your body helps you target the right symptoms with the right fixes.
Why Hangovers Feel So Bad
A hangover isn’t one problem. It’s several hitting you at the same time. Alcohol is a diuretic, meaning it forces your kidneys to produce more urine than usual. That leads to dehydration, which causes the thirst, dry mouth, headache, and nausea you wake up with. Along with water, you lose electrolytes like sodium and potassium, which throws off your body’s fluid balance even further.
Alcohol also drops your blood sugar. Your liver is busy processing alcohol instead of maintaining glucose levels, and many people skip meals while drinking, which compounds the problem. That low blood sugar contributes to the fatigue, shakiness, and brain fog that make the morning after so miserable.
Then there’s the sleep disruption, which is a bigger deal than most people realize. Alcohol sedates you initially, promoting deep sleep early in the night. But as it wears off, it triggers a withdrawal effect called rebound insomnia that wakes you up or keeps you in lighter sleep stages. It also suppresses REM sleep, the phase responsible for feeling rested and helping with memory and concentration. On top of that, alcohol relaxes your airway muscles, which can cause or worsen sleep apnea. The result is that even if you slept for eight hours, your body didn’t get the restorative sleep it needed. Sleep apnea from drinking can even cause its own headaches, piling onto the dehydration headache you already have.
Rehydrate With More Than Water
Water helps, but it’s not the whole solution. Because you’ve lost electrolytes along with fluids, drinks containing sodium and potassium do a better job of rehydrating you than plain water alone. Sports drinks, coconut water, or even broth all work. Pedialyte or similar oral rehydration solutions are another solid option.
Start drinking fluids as soon as you wake up and keep sipping throughout the day. Don’t chug a liter of water and call it done. Steady intake over several hours is more effective at restoring your fluid balance.
Eat Something, Even If You Don’t Want To
Your blood sugar is likely low, and your body needs fuel to recover. Toast and juice is the classic recommendation for a reason: it gently brings glucose levels back up without overwhelming a queasy stomach. Bland, easy-to-digest carbohydrates like crackers, rice, or bananas are good starting points.
If you can manage something more substantial, adding protein and a small amount of fat can help stabilize your energy levels for longer. Eggs, oatmeal, or a simple soup all work well. The goal isn’t a feast. It’s getting enough calories and nutrients into your system to support recovery.
Choose the Right Pain Reliever
This is where people make a dangerous mistake. Reaching for acetaminophen (Tylenol) when you’re hungover puts stress on a liver that’s already working overtime. Both acetaminophen and alcohol are processed by your liver, and they compete for the same protective compound called glutathione. Heavy drinking depletes those stores, making your liver more vulnerable to damage from acetaminophen. The biggest risk of combining the two is liver failure. Acetaminophen toxicity accounts for nearly half of acute liver failure cases in North America.
Ibuprofen or aspirin are generally better choices for hangover headaches and body aches, though they can irritate your stomach lining, which may already be inflamed from the alcohol. Take them with food and water. If you have a sensitive stomach or a history of ulcers, even these options can be rough.
What About Hangover Pills and Supplements?
Hangover pills typically contain ingredients like ginger, prickly pear extract, peppermint, B vitamins, and various herbal blends. Some of these have mild benefits for individual symptoms. Ginger and peppermint can settle nausea, for instance. But no well-designed clinical study has proven that any hangover pill actually works as advertised. The FDA has issued warning letters to companies illegally marketing products as hangover cures. These claims are unregulated, and what a product says it does may not reflect reality.
That doesn’t mean every ingredient is useless. Ginger tea for nausea or a B-vitamin complex for general recovery won’t hurt. Just don’t expect a pill to erase the hangover.
How Long It Actually Lasts
In a controlled study where participants drank a standardized amount of alcohol, hangover severity started increasing about 8 hours after drinking and peaked at around 14 hours. After 16 hours, symptoms dropped off rapidly. By 21 hours, most subjects reported little to no hangover. The average total duration was about 18 hours from the last drink, with most people falling somewhere between 14 and 23 hours.
That timeline means if you stopped drinking at midnight, you’d feel worst around 2 p.m. the next day and start improving by 4 p.m. Most people feel close to normal by the following evening. How much you drank, your body weight, hydration status, sleep quality, and individual genetics all shift this window.
Prevent the Next One
Eating before you drink is one of the most effective things you can do. A meal with protein, fat, and fiber slows the emptying of your stomach, which slows alcohol absorption into your bloodstream. Fat takes especially long to digest, making it particularly helpful. Eggs, avocado, nuts, whole grains, or a proper dinner before going out all buy your body more time to process alcohol gradually rather than in a rush.
Your choice of drink matters too. Darker alcohols like bourbon, whiskey, and red wine contain higher levels of congeners, chemical byproducts of fermentation that worsen hangover symptoms. A study comparing bourbon and vodka found that bourbon produced significantly more severe hangovers. Clear spirits like vodka and gin have fewer congeners. Beer falls somewhere in the middle. Switching to lighter-colored drinks won’t prevent a hangover entirely, but it can reduce how bad you feel.
Alternating alcoholic drinks with water throughout the night addresses dehydration before it starts. Drinking a full glass of water before bed helps too, though it won’t fully offset hours of fluid loss. Pacing yourself, so your liver can keep up with processing, remains the single most reliable prevention strategy.